Boiler-compound mixer and feeder.



T. E. PALMER & W. W- BAKER.

BOILBR COMPOUND MIXER AND FEEDER.

APPLICATION FILED MAY 24, 1909.

. 939,540, Y Patented Nov. 9, 1909.

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T. E. PALMER &. W. W. BAKER.

BOILER COMPOUND MIXER AND FEEDER.

APPLICATION FILED MAY 24. 1909.

Patented N0v.'9, 1909.

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THOMAS E. PALMER Ann WILLIAM w. BAKER, or Enwoon, INDIANA.

BOILER-COMPOUND MIXER AND FEEDER.

Specification of Letters Patent.

7 Patented Nov. 9, 1909.

Application filed. May 24, 1909. Serial No. 498,047.

To all whom it may concern:

Be itknown that we, THoMAs E. PALMER and WILLIAM W. BAKER, citizens ofthe United States, residing at Elwood, in the county of Madison andState of Indiana, have invented certain new and useful Improvements inBoiler-Compound vMixers and Feeders; and we do declare the following tobe a full, clear, and exact description of the invention, referencebeing had to the accompanying drawings, and to the figures of referencemarked thereon, which form a part of this specification.

This invention relates to apparatus for mixin chemical compounds andalso apparatus or feeding the compounds into water to be converted inboilers into steam, the invention having reference particularly toapparatus for mixing the class of compounds, the ingredients of whichare liable to -sep arate when not agitated.

The object of the invention primarily is to provide improved apparatuswhereby boiler compounds may be thoroughly mixed economically and fed asrequired to the water that is to be used in the boilers, for the purposeof improving the quality of hard or otherwise bad water for boilers.

With the above mentioned and other objects in view, the inventionconsists in apparatus of novel construction and arrangement forautomatically mixing and feeding boiler compounds, as requiredfor use;and the invention consists further in the parts, and combinations andarrangements of parts, as

hereinafter particularly described and then pointed out in theaccompanylng claims.

Referring to the drawings, Figure 1 is a side elevation of asteam-boiler and its furnace having the improved compound mixer andfeeder connected therewith, and illustrating the manner of deliveringthe feedwater and compound to the boiler; Fig. 2, a top plan'of themixing and feeding apparatus; Fig. 3, an elevation of parts of thedelivery line of pipe having a sight-feed glass connected therewith;Fig. 4, a fragmentary sectional elevation of parts of the apparatus onan enlarged scale; Fig. 5, a vertical central sectional view of themixing tank and i apparatus therein; Fig. 6, a horizontal sectional viewof the mixing tank and apparatus therein; Fig. 7, an inverted plan viewof the jet-pipes comprising parts of the mixing apparatus; Fig. 8, avertical sectional view of a regulating valve comprising a part of themixing apparatus; Fig. 9, an elevation of the valve-regulating screw;and Fig. 10,

. a perspective view of one of the spring guides used in the valveconstruction.

Similar reference characters in the different figures of the drawingsindicate like parts or features of construction referred to herein.

In the drawings, the numeral 1 indicates the furnace-wall; 2, thefurnace, door; 3, a

boiler mounted on the wall; t, the smokebox; and 5, the steam-dome ofthe boiler, shown to illustrate the relative arrangement and functionofthe invention.

Water may be supplied to the boiler by any suitable means, such as apump having a steam-cylinder 6 and a water-cylinder 7 with a steam-chest8 connected with the steam-cylinder, and a delivery-pipe 9 connectedwith the water-cylinder and also with the boiler, there being asteam-pipe 10 con" nected with the steam-chest and also with athrottle-valve 11 that is connected by a supply pipe 12 withthesteam-dome 5 of the boiler, the feed-pump receiving water from awell-pipe 13 or suction-pipe supplied from any suitable source, the pipe13 being C011- nected by a pipe section 14 to which is connected astop-valve 15 from which a pipe section 16 extends to the water-cylinder7 of the feed-pump. In some cases a feedwater heater 17 is used, "inwhich case a pipe section 18 is connected with the pipe 13 and has astop valve l9 connectedthereto from which extends a pipe section 20leading to a stop-valve 21 which is connected with the heater 17, apipe-section'22 extending from the heater and having a stop-valve 23connected thereto from which a pipe-section 24 extends to pipe-section16, so that if the valve 15 be closed and the valves 19, 21, and 23opened, the water may pass from the Wellpipe through the heater to thepump. The heater is connected to a steam-supply pipe 25, and is providedwith an exhaust pipe 26 as usual.

The invention comprises a mixing tank consisting of a side-wall 27, abottom 28, and a cover 27, the tank being provided with suitablesupporting legs 29, whereby the tank is supported at a suitable heightfor convenience in operation. The bottom of the tank has a nipple 30extending through and attached thereto, the bottom being preferablyreinforced by an annular plate 31 attached thereto and extending aboutthe nipple. A nut is attached to the upper end of the nipple and has astrainer 33 attached thereto to strain the boiler compound that may flowfrom the tank through the nipple, the lower end of the nipple having areducing coupling 34 thereon to which is connected a relatively smalldelivery-pipe A relatively small feed-pump is employed that comprises asteam-cylinder 36 and a water-cylinder 37, with a steam-chest 38 on thesteam-cylinder that is connected with a steam-pipe 39 provided withathrottle-valve 40, from which extends a pipe-section 41 that isconnected with the steam-pipe 10 of the boiler-feeding pump. Apipe-section 42 is connected with the water-cylinder 37 and has a nipple43 connected therewith to which a regulating-valve 44 is connected. Apipesection 45 extends from the regulating-valve and preferably has apipe-tee 46 connected thereto, the section 45 extending vertically tothe tee, the tee having a pipe section 47 connected thereto, to which avalve 48 preferably is connected, a pipe-tee 49 being connected with thevalve 48 and having a sight feed glass 50 extending downward there fromand connected with a pipe-tee 51 from which extends a pipe-section 52 tothe pipe section 20, so that the compound may be delivered either to theheater 17, or direct to the pipe-section 14 to pass with the feedwaterto the boiler-feeder. A pipe-section 58 is connected with thepipe-section E20 and also with the delivery-pipe 9, and is provided witha stop-valve 54 so that if desired the compound may be delivered to theboiler with the feed-water without passing through the boiler feeder. Asolid rod 55 is attached to the tees 46 and 51 to serve as a brace forthe pipes to prevent accidental fracture of the sight-feed glass. Itshould be understood, of course, that the sight-feed glass may beomitted, if desired, and will be of service only when arranged at properelevation, and the compound is delivered to a suction-pipe, being of nopractical use if the compound be delivered in a solid stream di rect tothe delivery-pipe 9 against the boiler pressure. A steam-pipe 56 isconnected with the steam-pipe section 41 and also with the tee 49, andis provided with a valve 57, so that in some cases steam may be admittedto the sight-feed glass, in which case the rate of feed of the compoundmay be observed with the glass partly filled with the compound, and theupper part of the glass filled with steam, which result may be obtainedwith obvious manipulation of various valves above-mentioned.

In order to thoroughly and economically mix the boiler compound, anipple 58 is con nected to the pipe-section 42 and has a valvecase 59connected thereto, the valve-case having a valve-seat 60 therein onwhich is a valve 61 having a stem 62 suitably guided teases so that thevalve may from the valveseat, the stem 62 havin a spring-guide (32%thereon on which a coil-spring (34 is seated. The valve-case has a head(35 provided with a yoke 66 in which a regulating screw (37 is mountedand extending through the head 65, the inner end of the regulating screwhaving a valve-guide (38 thereon against which the spring is seated. Apackinggland 69 is employed with the head (35 and the stem of the screw(5?, and a lock-nut 70 is placed on the screw and normally bears againstthe yoke (36 for preventing accidental turning of the screw, the latterhaving a hand-wheel 67 on its outer end.. A pipe section Tl is attachedto the valve-case 59 and extends through and is attached to the wall 27of the mixing-tank. the inner end of the pipe-section 71. having apipecross 72 attached thereto, to which the two ends of a curvedjet-pipe T3 are connected, the pipe being arranged at a short distanceabove the bottom of the tank and the under side thereof havingrelatively small jet-holes, as T4, '74, therein, from which jets may beprojected onto the bottom of the tank to agitate the heavier particlesof the compound and insure thorough mixing thereof. A pipe-tee T 5 isconnected also with the pipe-cross and has the two ends of a shortercurved pipe 76 connected thereto, so as to be concentric to the pipe 73,and having jet-holes as 7T, 7T, in the under side thereof from whichjets may be projected downward toward the bottom 28.

The valve (31, as will be seen, is loaded by means of the spring 64, andthe load may be increased or decreased by manipulation of the screw 67,and ordinarily and valve should rise when relatively low pressure, asfor instance five pounds per square inch, is exerted by the pump againstthe under side of the valve, but if the compound is delivered againstthe boiler prr-xssure the spring 64 must be compressed, so as to exert apressure on the valve slightly greater than the pressure maintained inthe steam-boiler.

It will be understood that instead of employing all the various pipesfor delivering the compound intothe delivery-pipe 9, either through theboiler-feeder or through the feed-water heater, any simple system ofpipe lines may be employed for delivering the compound from thepipe-section 21-5 into the boiler.

In practical use, water and a suitable ingredient or ingredients to forma compound of a desired clniracter are placed in the mixing-tank, andthe valve 40 being opened the compound feeding pump will operate to drawthe compound through the pipe section and discharge it through thepipesection 42, and the valve 44 being opened slightly the compound willpass through the pipe section 45. The valve 44 should be valve 44 withthe result that the valve 61- will open and permit the surplus orundelivered compound to pass through the pipesection 71 and be forciblydischarged from the jet-pipes 73 and 7 6 toward the bottom of themixing-tank, for agitating the compound and keeping it well mixed whilebeing fed to the boiler. The spring6 l may be more or less compressedinorder to increase the force of the jets when required for thoroughlyagitating and mixing the compound on the bottom of the mixing-tank.

Having thus described the invention, what is claimed as new, is

1. Means for mixing and feeding boiler compound including a mixing tank,a forcepump, a supply-pipe leading from the tank to the force-pump, adischarge-pipe leading from the force-pump, a branch-pipe leading fromthe discharge-pipe to the tank and provided with a weighted valve tonormally close the passage therethrough, a Valve for partially closingthe discharge-pipe to create pressure therein for opening the Weightedvalve, and a jet-pipe in the tank connected to the branch-pipe.

2. A boiler compound mixer and feeder including a mixing tank, aforce-pump, a supply-pipe leading from the tank to the force-pump, astrainer in the tank over the opening of the supply-pipe, adischargepipe leading from the force-pump, a branchpipe leading from thedischarge pipe to the tank and having a valve-case connected therewith,a valve seated in the valve-case, a spring normally holding the valve tothe seat, means for adjusting the tension of the spring, twoconcentrically-arranged curved jet-pipes in the tank connected with thebranch-pipe, a valve connected with the discharge-pipe, and a sight-feedglass connected with the discharge-pipe.

In testimony whereof, we affix our signatures in presence of twowitnesses.

THOMAS E. PALMER. WILLIAM W. BAKER.

